A.ship’s movement
B.safety
C.ship’s management
D.hazards
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A.by day or at night
B.almost round the clock
C.somewhat and sometime
D.from sunrise and sunset
A.DF
B.Radar System
C.DSC System
D.COSPAS-SARSAT
A.nature of distress
B.type of assistance required
C.course and speed and time at which the information was recorded
D.A, B, C are all right
A.when two stations communicate with each other
B.in any radio system and at any time
C.when one ship sends a message to another station
D.for communication among some stations
A.VHF channels 16 and 13
B.Appropriate DSC distress and safety frequencies
C.INMARSAT TDM message channel
D.VHF channel 70 and channel 8
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The quality of EGC messages is（）affected by the position of the ship, the time of reception and climatic conditions.
At least two two-way VHF radiotelephone apparatus shall be provided on every cargo ship of（）tons gross tonnage and upwards but less than 500 tons gross tonnage.
Every ship constructed on or after（）shall comply with all the applicable requirements of this chapter.
Before GMDSS, if the radio officer on board is serious ill,（）.
Radio communication（）for many years and helps to save tens of thousands of lives.
（）will form the basis for distress alerting and safety calling.
In case a ship is in emergency or distress in any of 4 areas, it is required to use the continuous（）alert.
What following is not among the function of SOLAS ships?（）
COSPAS-SARSAT is intended to be used for（）.
SafetyNet is an international service for the broadcast and automatic reception of MSI by means of direct-printing through（）system.